xiv COXTIXTS 



CHAPTER 6C— STEPS IN rill-: l'i;i:i.l Ml \ M; V DESIGN— Continued 



66.7 The Maximum-Section Coefliciont; Tlio 



Draft Hiid lU-nm 



608 Finit K»tini;itc of Hull Volume 



66.9 First Approxlniiilion to Shaft I'ower . . . 



06.10 Secoiiil l'>tim:itv of l'rin('i|>:il Wi'iglitjt . . . 

 00.11 Second Approximution to I'rinoipiil Dimen- 



sioiiM uiul Proportions 



66.12 Selection of Hull Shape 



00.13 Layout of Mu.xinuim-Scction Contour . . . 



00. 14 First llstimnte lU-hiting to Motuccntric Sta- 

 bility 



06.15 First Skeloh of Designed Wiiterline Shape . 



00.10 I'j!timiitfd Draft Variations 



00.17 Sketching the Section-Area Curve; The 

 Miuximum-Area Position 



66.18 P:irallcl Middlebody 



06.19 Bulb-Bow Panimeters 



66.20 Transom-Stern Parameters 



60.21 The Preliminary Section-Area Curve . . . 



66.22 I/ongitudinal Position of the Center of 



Buoyancy 



66.23 Preparation of Small-Scale Profiles and 



S<MMi()nM 



Molding a New Underwater Form .... 488 



Bow and Stern Profdes 491 



Analysis of the Wotted Surface 493 



Second .Vpproxiniatlon to Sh:ift Power . . 493 

 Sketching of Wave Profile and I'robable 



Flowlines 494 



Comparison with a Ship Form of Good Per- 

 formance 490 



Abovewatcr Hull Proportions for Strength 



and Wavegoing 490 



First Longitudinal Weight and Buoyancy 



Balance 497 



Propeller Submersion and Trim in Variable- 

 Load Conditions 498 



First Appro.ximation of Steering, Maneuver- 

 ing, and Shallow- Water Behavior .... 501 

 Preparation of Alternative Preliminary De- 

 signs 501 



Laying Out Other Types of Hulls 502 



EfTect of Unrelated Factors Upon the 

 Hy<iroilyM:imic Design 502 



CHAPTER G7— DETAIL DESICX OF THE UNDERWATER HULL 



67 . 1 General 



67.2 Shajjc of Vessel Near Designed Watcrplane 



67 . 3 Watcrline Curvature Plots 



67.4 Underwater Hull Profile 



67.5 Stem Shape at Viu-ious Waterlines .... 



67.6 Design of a Bulb Bow 



07.7 Ikying Out the Bulb for the ABC Ship . . 



07.8 Check on Bulb Cavitation 



67.9 Selection of Section Shapes in Entrance and 



Run 



67.10 Variation of Section Coefficient Along the 



Length 



67.11 Hull Shape Along the Bilge Diagonal . . . 



67.12 Side Blisters or Bulges 



67.13 General Arrangement of Single-Screw Stern . 

 67 . 14 Stem Forms for Twin- and Quadruple-Screw 



Vessels 



67.15 Notes on Three- and Five-Screw Installa- 

 tions 



67.10 The Arch Type of Single-Screw Stern . . . 



07.17 Flow Analysis for the Arch Type of Stern . . 



07. 18 Dc.Mign of Mull .'ind .\ppcndage Coinbinntions 



515 



07.24 



Comments on Design of an Unsymmetrical 

 Single-Screw Stern 



Proportions and Characteristics of an 

 Immersed-Transom Stern 



The Design of a Mulliple-Skeg Stern . . . . 



Design Notes for the Contra-Guide Skeg 

 landing 



Shaping the Hull .\(ljacent to Propulsion- 

 Device Positions; Hull, Skeg, and Bossing 

 Endings 



Aperture and Tip Clearances for Propulsion 

 Devices 



Baseplane and Propeller-Disc Clearances 



.\dequate Propeller-Tip Submergence . . . 



Design for Minimum Thrust Deduction . . 



The Final Scction-.\rea Curve 



Modification of Normal Design Procedure 

 for a Hull with Keel Drag 



Underwater Exhaust for Propelling Macliin- 



528 



529 

 531 



536 



537 

 540 

 541 

 541 

 542 



ery 



General Notes on Water I''low as .Vpplicil 

 to Hull Design 



543 

 545 

 545 



CH.M'TKli (is LAVin.T Ul' TllIC AHOVKWATKK FUliM 



68.1 General Design P'eatures, K.xclusive of 



Wavegoing 540 



08.2 UoDcrve-Buoyancy Re<|uircmentii 540 



68.3 Freeboard and Sheer for Protected Waters . 547 



68.4 Freeboard and Sheer for General Service 547 

 08.6 Deiiigii of Abovewatcr Section Shapes; 



Tumble Homo; Compound Flare .... 551 

 08.0 Check of llange of Stability and Dynamic 



Mirtarehlrir Stability 553 



08.7 Abovewatcr Profile and Di'ck Det.iils . . . 553 



08.8 Selection of Deck (Camber 553 



08.9 Bulwarks and Breakwaters 554 



08. 10 Design of .Xnrhor Kcccs-scs 550 



08.11 Proposed Undcr-tho-Botlom Anchor In- 



stidlation for Ships with Bulb HowB . . . 558 



08.12 Knuckles and Other Ix>ngitudinal Discon- 



tinuities 500 



08.13 Transverse Discontinuities 501 



